Stable isotope record of planktonic foraminifera of the South Atlantic ...

The central problem of late Quaternary circulation in the South Atlantic is its role in transfer of heat to the North Atlantic, as this modifies amplitude, and perhaps phase, of glacialinterglacial fluctuations. Here we attempt to define the problem and establish ways to attack it. We identify sever...

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Bibliographic Details
Main Authors: Wefer, Gerold, Berger, Wolfgang H, Bickert, Torsten, Donner, Barbara, Fischer, Gerhard, Kemle-von Mücke, Sylvia, Pätzold, Jürgen, Meinecke, Gerrit, Müller, Peter J, Mulitza, Stefan, Niebler, Hans-Stefan, Schmidt, Heike, Schneider, Ralph R, Segl, Monika
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 1996
Subjects:
Giant box corer
Gravity corer Kiel type
MultiCorer
M6/6
M9/4
M12/1
M16/1
M16/2
Meteor 1986
Geosciences, University of Bremen GeoB
South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261
NADW
North Atlantic
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.738529
https://doi.pangaea.de/10.1594/PANGAEA.738529
Description
Summary:The central problem of late Quaternary circulation in the South Atlantic is its role in transfer of heat to the North Atlantic, as this modifies amplitude, and perhaps phase, of glacialinterglacial fluctuations. Here we attempt to define the problem and establish ways to attack it. We identify several crucial elements in the dynamics of heat export: (1) warm-water pile-up (and lack thereof) in the Western equatorial Atlantic, (2) general spin-up (or spin-down) of central gyre, tied to SE trades, (3) opening and closing of Cape Valve (Agulhas retroflection), (4) deepwater E-W asymmetry. Means for reconstruction are biogeography, stable isotopes, and productivity proxies. Main results concern overall glacial-interglacial contrast (less pile-up, more spin-up, Cape Valve closed, less NADW during glacial time), dominance of precessional signal in tropics, phase shifts in precessional response. To generate working hypotheses about the dynamics of surface water circulation in the South Atlantic we employ Croll's ... : Supplement to: Wefer, Gerold; Berger, Wolfgang H; Bickert, Torsten; Donner, Barbara; Fischer, Gerhard; Kemle-von Mücke, Sylvia; Pätzold, Jürgen; Meinecke, Gerrit; Müller, Peter J; Mulitza, Stefan; Niebler, Hans-Stefan; Schmidt, Heike; Schneider, Ralph R; Segl, Monika (1996): Late Quaternary surface circulation of the South Atlantic: The stable isotope record and implications for heat transport and productivity. In: Wefer, G; Berger, W H; Siedler, G & Webb, D (eds.), The South Atlantic: Present and Past Circulation, Springer, Berlin, Heidelberg, 461-502 ...

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